danielgospodinow

function ensureImagesFolder(imageDirectory) {
    if (!fs.existsSync(imageDirectory)) {
        console.log("Creating folder for image storage ...");
        
        fs.mkdirSync(imageDirectory);
    }
}

danielgospodinow

function cleanupImages(imageDirectory, imageDirectoryCapacity) {
    const images = fs.readdirSync(imageDirectory);
    if (images.length >= imageDirectoryCapacity) {
        console.log("Cleaning up space ...");
        fs.unlinkSync(imageDirectory + "/" + images.pop());
    }
}

danielgospodinow

async function updateBackground(imageResolution, imageCategories, imageDirectory) {
    console.log("Starting wallpaper change procedure ...");

    try {
        const imageResponse = await fetch(`https://source.unsplash.com/featured/${imageResolution}?${imageCategories}`);
        const image = await download.image({ url: imageResponse.url, dest: imageDirectory });
        await wallpaper.set(image.filename);

        console.log("Wallpaper changed successfully!");
    } catch (e) {

danielgospodinow

"use strict";

const fetch = require("node-fetch");
const download = require("image-downloader");
const wallpaper = require("wallpaper");
const schedule = require("node-schedule");
const fs = require("fs");

const imageDirectory = "./images";
const imageDirectoryCapacity = 10;

danielgospodinow

schedule.scheduleJob("0 * * * *", async () => {
    await ensureImagesFolder(imageDirectory);
    await cleanupImages(imageDirectory, imageDirectoryCapacity);
    await updateBackground(imageResolution, imageCategories, imageDirectory);
});

danielgospodinow

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.dg.osgi</groupId>
    <artifactId>calculator-provider</artifactId>
    <version>1.0.0-SNAPSHOT</version>

danielgospodinow

public interface Calculator {

    int add(int a, int b);

    int multiply(int a, int b);
}

danielgospodinow

import com.dg.osgi.calculator.provider.api.Calculator;
import org.osgi.service.component.annotations.Component;

@Component
public class CalculatorImpl implements Calculator {

    public int add(int a, int b) {
        return a + b;
    }

danielgospodinow

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.dg.osgi</groupId>
    <artifactId>calculator-consumer</artifactId>
    <version>1.0.0-SNAPSHOT</version>

danielgospodinow

import com.dg.osgi.calculator.provider.api.Calculator;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;

@Component
public class CalculatorConsumer {

    @Reference
    private Calculator calculator;